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Starter circuit of electronic ballast

An electronic ballast and self-starting technology, which is applied in the direction of electric light sources, electrical components, lighting devices, etc., can solve the problems of complex design of self-starting circuits and high power consumption

Inactive Publication Date: 2013-11-20
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a simple and easy self-starting circuit for the problems of complex design and high power consumption of the above-mentioned electronic ballast self-starting circuit

Method used

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  • Starter circuit of electronic ballast
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  • Starter circuit of electronic ballast

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Embodiment Construction

[0021] The self-starting circuit in the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0022] see figure 1 , is the block diagram of the self-starting circuit in the electronic ballast. The power factor correction circuit PFC (Power Factor Correction) cannot detect the output signal of the internal zero current detection circuit when it is first powered on, and cannot trigger the RS flip-flop to send a signal to turn on the switching power tube outside the power factor correction circuit, so the PFC cannot into normal working condition. The existence of the starter circuit (Starter) solves this problem. Its basic function is to send a trigger signal to the S terminal of the RS register (RS trigger) when the PFC is powered on, and the corresponding RS trigger is set to a high level "1", which is sent to the outside of the PFC circuit. To turn on the switching power tube. This process completes the transitio...

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Abstract

The invention discloses a starter circuit based on an electronic ballast power factor correction (PFC) circuit. The circuit consists of a current bias unit (1), an or not gate unit (2), a charging and discharging unit (3), an inverter unit (4) and a pull-down unit (5), and the circuit is valid only when the electronic ballast just starts to work or the circuit is abnormal so as to convert the PFC circuit from an electrified state or an abnormal state to a normal working state. The starter circuit disclosed by the invention can adjust the size (width to length ratio W / L) of a tube in the charging and discharging unit and control the output of the self circuit so as to further overcome the defect that an electronic rectifier cannot normally start a switch power tube when a chip starts to be electrified or the chip works abnormally, and can better protect the circuit.

Description

technical field [0001] The invention relates to a device of an electronic ballast for a fluorescent lamp, in particular to a self-starting generating circuit of the electronic ballast. Background technique [0002] Electronic ballast components are important components for the normal operation of fluorescent lamps. When the ballast works in the abnormal state specified in the national standard GB19510.4, it is likely to generate severe heat and cause internal components to be burned. Therefore, it has the reputation of "saving electricity but not saving money", which is extremely uneconomical from an economic point of view. The reason for this phenomenon is mainly because the power factor correction circuit PFC (Power Factor Correction) in the electronic ballast cannot detect the output signal of the internal zero current detection circuit when it is first powered on, and cannot trigger the RS flip-flop Send a signal to turn on the switching power tube outside the power fac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B41/295
Inventor 谢雪松彭振宇张小玲齐浩淳佘硕杰杨娟郭敏吕长志
Owner BEIJING UNIV OF TECH